Core-making machine



Patented dan.. Z, i923.

GEORGE H. 'i/VADSVOBTH,JOF-AKRN, OHO,*ASSCTNOPJ TO THE NADSWRTH CORE -MACHINE -AND `EQUIPIJEBT" CQVPANY, OF AKR-GN, OHIO, 'A CORPORATION OF OHICL CORE-MAKENG ACHINE.

Application filed November 30, 1920.

To all w/ov/z it may con-cern.'

Be it known that l, GEORGE rl. Wraps@ woarrL a citizen ot the United States, residing at Akron, in the county of Summit and StateioiI Ohio. have invented a certain new and usei'ul Improvement in Core-Making lvlachines7 of which the following is a full, clear, and exact description. reference heing had to the accompanying drawings.

h/ly invention relates to'machines Vfor making cores of vthe type in which material such as sand is forced into. and through a die by suitable means such as a-screw or wormf One of the particular objects is the provision of a machine capable otmaking cores ot different diameters by the merereplacenient of the die and without the'changing of the propeller screw. Heretofore. it has been considered necessary to have ther portion of the propeller screw adj acent'the die practically vthe same as, or slightly smaller. in diameter than the die, but theapplicant has found that a die ot much smaller diameter' can be used in connectionwith such a propeller screw.

Vtrom the walls of the die and having a portion extending longitudinally of the die, Vand that rthe core when formed in such a die will close together afterpassing the transversely extending member and y thereby form a core with the ordinary central vent.

Referring to the drawing7 in which an approved embodiment of my invention is shown, Fig. 1 is -a sectional view of the center of the machine; Fig. 2 is a fragmentary end view looking from the lett of Fig. 1; Fig. 3 is a fragmentary longitudinal section thru the die and propeller shaft showing the relation ot these members.

ln the drawing, 10 represents the base of the machine carrying the hopper 11 by means of the legs 12. The propeller shaft 13 carries the lscrew or worm 14e and the shaft has secured thereto a sleeve 15. The sleeve 15 is journaled in bearings 17 car- Selial TTD. 427,284.

Lpulley ywheel 20.

The screw 14 occupies the bottom ot' the hopper 11 'and Yextends' outwardly through the lateral opening 30- therein. Adjacent this opening the hopper is shouldered as shown at QZ'and provided with aithreaded boss 23, whereby a nipple of adie 25 may be held against thevshoulder Q2 by means `oit' a nut'QGthreaded upon the boss'QB. vThe die as illustrated comprises va plurality of tubes 9.9 of lesser diameter than the screw. The vent forming stems 27 project inwardly from the walls `of the tubesand have a portion 28 extending longitudinally of each tube to form the'vent opening in the core.

The operation of' the ldevice is briefly as 'lollows:- Sand or other material for making the core is placed in the hopper and passes the" members 27, lit flows around the transversely extending portion. and after passing the VVsame fcloses together. The longitudinally Aextended part. however, eX- tendsfar'enough to hold a central vent open 'untilthe material is suliiciently'set so that it will not close this. opening.' and the ordinary form of core with afcentral vent Aopening is therefore formed. lows the escape' of the vapors andgases resulting in the subsequent baking process.

It will be apparent from the description that in order to form a core of a different diameter it is only necessary to remove the die and replace it by another die of the required size. As the nipple of such other die is of the same size as the one illustrated it is not necessary to change the propeller screw7 whereby a great saving is effectedy over the former practice, as these propeller shafts are the most expensive part of the machine.

The expedient of carrying the central vent forming stem by means projecting transrFhis opening alversely of the die does away with the necessity of either carrying such a stem by the propeller shaft (which construction unnecesembodying my invention, it is apparent that many forms of device may be made, embodying the principles of the invention. The foregoingy description is, therefore, to be taken as illustrative and not restrictive.

. Having thus described my invention, I

, claim 1. In a core making machine, a die, a vent forming member extending longitudinally thereof and carried by the die.

2. In a coremaking machine, a die comprising a tube having a vent forming member extending longitudinally thereof, and. carried by the die.

3. In a core forming machine, a die comprising a tube having .a member provided with a portion extending radially, and ak portion extending axially of said tube for forming a vent opening in acore.

4. In a core making machine, a tubular die, a forming stem having a portion extending transversely ofthe tube and a longitudinally extending portion in the center of the tube.

5. In a core making machine, a nipple having an opening therein, a plurality of tubes carried thereby, vent forming means ings of said tubes communicating with the opening 1n said nipple.

6. In a core maklng machine, a nipple having an opening therein, a plurality of tubes carried thereby, with the openings thereof communicating with the opening in said nipple, and a longitudinal extending vent forming member carried by said tubes.

7 In a core forming member, a hopper, a screw conveyer, a die and a vent forming member, said vent forming member being supported on a wall of the die.

8. In a core making machine, means to hold a supply of material, a screw to convey said material to a die, a removable sleeve surrounding a portion of said screw, a plurality of dies secured to saidsleeve, said screw terminating adjacent the `end of said dies.

9. In a core making machine, a hopper, a conveying screw, saidghopper having a circular rabbeted boss surrounding said screw, a sleeve set in said rabbet and into which said screw extends and a plurality of dies secured in said sleeve.

10. In a core making machine, a hopper, a conveyer screw and a die, said die being of Vmaterially less diameter than the conveyer screw, and vhaving its end extending to a point adjacent the end of said conveyer screw. v

11. In a core making machine, a hopper, a material conveying screw and a removable die member in alignment with said screw, said die member comprising a sleeve arranged axially of said conveyer and a plurality of dies carried by said sleeve.

12. In a core making machine, a hopper, a

material conveying screw and a die member comprising a plurality of aligned dies,'the axes o-f which are parallel and are equally spaced from the axis vof the conveyer screw wherebythe feed into each portion of the die is uniform. p

. 13. In a; core making machine, a hopper, a material yconveying screw, a die and a vent `forming member, said vent forming member being located and supported intermediate the ends of the die, whereby the die.

opening is unobstructed to thus cause a l tight compacting of the materialin the die. carried by the walls of said tubes, the open- 

